I purchased 3 411uahl boards. All the boards have a slight clicking sound when operating. Sounds like it is coming from the middle of board. I have tried POE and power header. Also tried 3 different power supplies; the boards all still click. Is this normal? Do I need to be concerned?
Also on another note, I noticed that they ethernet connectors are plastic on this board. Is there still a bonding inside the connector from board to shielded ethernet cable? If not, then this could be a problem during storms.